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Öğe Comparative investigation of Bulbus Oculi in Akkaraman and Morkaraman sheep(Dicle Üniversitesi Veteriner Fakültesi, 2024) Karaavcı, Funda Aksünger; Dörtbudak, Muhammet Bahaeddin; Demircioğlu, Muhammed; Güzel, Barış CanAkkaraman and Morkaraman sheep breeds constitute more than half of the sheep breeds in Turkey. The eye is one of the most complex organs of the body in humans and animals that receives and processes light impulses from the environment, converts them into electrical signals through anatomical and physiological mechanisms, and transmits them to the visual cortex of the central nervous system. Anatomical-morphometric and histological investigations of the bulbus oculi in Akkaraman and Morkaraman sheep breeds will provide reference data for veterinary sciences and human medicine where sheep are used as models. For this purpose, a total of 80 bulbus oculi, right and left, from both breeds and sexes were used in the study. For morphometric measurements, 20 parameters were evaluated. Hematoxylin and eosin-stained preparations were examined under a light microscope after routine tissue monitoring procedures for histologic examination. In the statistical evaluation of the data, it was determined that significant differences according to sex were less in Akkaraman breed than in Morkaraman breed. In the comparison between the species, it was noteworthy that the differences in females were higher. It is thought that the results of the study will provide data both to the disciplines working in the field of veterinary medicine and to different disciplines, especially ophthalmology, as sheep are frequently used as a model in human medicine.Öğe Comparison of different fixatives effects in histochemical stainings of peripheral nerve tissue(Cellular and Molecular Biology Association, 2024) Dörtbudak, Muhammet Bahaeddin; Demircioğlu, Muhammed; Şeker, Uğur; Demircioğlu, İsmailA pathological condition in the peripheral nerve tissue, which provides the connection between the organism and the external environment, negatively affects the standard of living. The nerve tissue histotechnology is of serious importance both for scientific studies and for clinical diagnosis. The fixation, which is one of the leading procedures for histological examination of tissues, aims to preserve tissue morphology. Another essential part of the histological examination is staining process. This study, it was aimed to determine the fixative that provides optimal histological appearance in peripheral nerve tissue. Therefore, various histochemical stainings of tissues fixed with some fixatives used in practice were compared. Sciatic nerves from each rat (n=7) used in the study were fixed with different fixatives and histochemical staining was performed. In histological examination, cellular (nucleus-cytoplasm) and intercellular morphological details, staining intensity and distribution were evaluated. At the end of the study, formaldehyde was found to be the most ideal fixing agent for all stains. Although Bouin and Carnoy fixatives differed according to the staining type, their fixation quality was similar in general. Glutaraldehyde did not give as good results as other fixatives in all stainings. This study is an important technical reference for clinical and experimental studies. © 2024 Cellular and Molecular Biology Association. All rights reserved.Öğe Investigation of glandula uropygialis in different avian species using morphometric and histological methods(John Wiley and Sons Inc., 2024) Karaavcı, Funda Aksünger; Dörtbudak, Muhammet Bahaeddin; Demircioğlu, Muhammed; Koçyiğit, AliThe aim of this study was to identify the glandula uropygialis's macroanatomical and histological structure in male and female birds (stork, goose, eagle, pigeon, crow and sparrowhawk) that belong to different populations. A total of 58 specimens were used in the study. The study materials were delivered to our laboratory by nature conservation and national parks, and no animals were euthanised for this study. The longitudinal and transversal lengths, dorsoventral heights and feather length of the glandula uropygialis and papilla uropygialis were measured with a digital calliper. Haematoxylin–eosin and Masson trichrome staining were performed for histological examinations. The shape of the glandula uropygialis was found to be pear-shaped in pigeons and sparrowhawks, heart-shaped in geese, kidney-shaped in eagles and oval-fascule-shaped in storks. In the crow, the shape of the glandula uropygialis was different from the other species in that it was located dorso-caudally. Histomorphological examination of the glands of these species revealed that the gland generally consisted of two lobes, right and left, surrounded by connective tissue from the outside. The parenchyma of these lobes consisted of tubulo-alveolar secretory glands with a radial arrangement from the periphery to the centre. The glands within the lobes differed from the periphery to the centre and although the general histomorphological appearance was similar between bird species, some differences were observed between species. Similar stromal structure was observed in all bird species evaluated in the study. However, the reticular connective tissue forming the roof of the gland was found to be more developed in pigeons, especially in Masson's trichroma staining. The degenerative layer in the glands was more prominent in the eagle, followed by the goose and crow. Although a common general histological structure was observed among bird species, simple histomorphological differences were found between these formations, but no differences were found between the sexes. The results obtained will be compared with the findings of the aves class and will provide a data source for this special gland specific to birds. It is thought that the results obtained may help to determine the functional properties of the gland and contribute to the science of ornithology.Öğe Investigations on the Light and Scanning Electron Microscopic Structure of Tongue Papillae of Morkaraman Sheep: Taste and Mechanical(Kyrgyz-Turkish Manas University, 2024) Demircioğlu, Muhammed; Dörtbudak, Muhammet Bahaeddin; Karaavcı, Funda Aksünger; Güzel, Barış Can; Demircioğlu, İsmailIn this study, the structure of the papillae in the tongue of Morkaraman sheep was investigated by light (LM) and scanning electron microscopy (SEM). The aim of this study was to investigate the morphology and topographic distribution of the lingual papillae of the tongues of Morkaraman sheep breed. Adult male Morkaraman sheep tongues were used in the study. Tongue samples for light and scanning electron microscopy were taken from the apex, corpus, radix and torus lingua regions of the upper surface of the tongue and the lower surface of the tongue tip. Two types of taste papillae, papillae fungiformis and vallata, were observed on the tongue. Papillae fungiformis were found under the tip of the tongue, on the upper surface and sides of the tip and body of the tongue and on torus lingua. Papillae vallata were observed on both posterior sides of the torus lingua of the tongue. SEM examination showed that the surface of the papillae was smooth and there were no taste pores opening to the surface. On LM examination, filiform papillae at the lingual apex were common in materials. These papillae had secondary keratin extensions on the main body. The light and scanning electron microscopic structures of the taste papillae on the tongue of Morkaraman sheep were examined and their similarities and differences with other ruminant species were determined.
